A Linux administrator receives a call from the network operations team that one of the database applications is down on a Linux server. The Linux server is configured with RAID 1 for redundancy, and the array /dev/md0 consists of two devices called /dev/sda1 and /dev/sdb1. After looking at the status of the RAID 1 array in the /proc/mdstat file, the administrator discovers the RAID 1 array is degraded and the disk /dev/sdb1 on which the database application was installed appears to have failed.

Which of the following steps should the administrator take to remove the device /dev/sdb1 from the RAID array md0? (Choose two.)

• A.mdadm /dev/sdb1 --remove /dev/md0
• B.mdadm /dev/md0 --fail /dev/sdb1
• C.racadm --fail /dev/sdb1
• D.mdadm /dev/md0 --remove /dev/sdb1
• E.racadm --remove /dev/sdb1
• F.mdadm /dev/sdb1 --fail /dev/md0

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After installing a new web server, you are unable to browse to the default web page.
INSTRUCTIONS
Review all the command output and select the command needed to remediate the issue.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

Correct Answer:

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A Linux administration is using a Linux system as a router. During the tests, the administrator discovers that IP packets are not being sent between the configured interfaces.
Which of the following commands enables this feature for IPv4 networks?

• A.cat /proc/sys/net/ipv4/ip_route > 1
• B.echo "1" > /proc/sys/net/ipv4/ip_forward
• C.echo "1" > /proc/sys/net/ipv4/ip_route
• D.echo "1" > /proc/sys/net/ipv4/ip_net

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A Linux administrator is testing a new web application on a local laptop and consistently shows the following
403 errors in the laptop's logs"

The web server starts properly, but an error is generated in the audit log. Which of the following settings should be enabled to prevent this audit message?

• A.httpd_enable_cgi = 1
• B.httpd_enable_scripting = 1
• C.httpd_enable_homedirs = 1
• D.httpd_can_network_connect = 1

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An administrator receives an alarm because the disk of one of the sewers is running out of space. Which of the following commands can be used to see the space that each partition is using?

• A.df -h
• B.cdu -scg /
• C.fdisk -l
• D.fsck /

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